Pneumatic-hydraulic gun.



-R-gumu. PNEUMATIC HYDRAULIC GUN.

APPLICATIOWFILED DEC. 3l, |915.

l l 83,64%. Patented May 16, 1916.

. A m Qq R E a Si BY Mmmm AnaB/vers n. c. HILL. PNEUMATIC HYDRAULIC GUN.

APPLICATION FILED DEC. 3l, I9I5.

1,1 83,644, Patented 16, 1916.

animen srafrns ragni@ namen.

ROLLIE CALVIN HILL, 0F MEMPHIS, TENNESSEE.

PNEUMATIC-HYDRAULIC GUN'.

Licence.

Application led December 31, 1915.

the combinations, constructions, and arrangements herein described and claimed.

An object of my invention is to provide a gun which may be fired by pneumatic means working in connection with a source o liquid supply.

A further object of my invention is to provide a pneumatic-hydraulic gun which may be unbreeched without loss of liquid.

Other objects` and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings forming part of this specification, in which:

Figure 1 is@ a section through the device. Fig. 2 is a section 'through the device showing the gun unbreeched. Fig. 3 is an enlarged detail sectional view of a portion of the device. Fig. 4 is a section on the line i-i of Fig. 2.

In carrying out my invention I provide a main casing 1 which is provided at one end with an arm 2 having a locking segment 3. A barrel 4 is provided, this barrel being ritled as shown at 5 and being provided with an extension or arm G which is pivoted t0 the arm 2 by means of a pivot pin 7. Secured to the arm 6 is a handle 8 provided with a locking device 9 arranged to engage the locking segment 3. The arm G is provided with a finger GX whose purpose Will be explained hereinafter. On the opposite side of the barrel are lugs or ears 3X arranged to engage a pivoted locking member 10 carried by ears or lugs 11 on the casing 1.

Supported in any suitable manner within the casing l is a cylinder 12 which is provided with a piston 13. The latter is mounted on a hollow shaft 14 which extends through the cylinder and which bears at one end a weight 15 having a groove 16. An auxiliary cylinder 17 is provided with a piston 18 mounted on a shaft 19. The latter is connected With a'plu'nger 20 arranged to Specification of Letters Patent. l

Patented May 1e, 1916.

Serial No. 69,645.

slide in a bore 21, in the casing 1, 'a stuliing box 22 being provided to prevent the escape of liquid from the bore 21.

At 23 I have shown a tank which is designed to be vsupplied with pressure, as for instance7 compressed air. A pipe P extends from this tank to a valve V, this pipe P being provided with a suitable pressure regulator p. Communicating with the valve V is a pipe 24 having a check valve 25, a bypass 26 being provided around the check valve. A pipe 27 also communicates with the valve V and is provided with a check valve 28. The pipe 27 has a by-pass 29 around the check valve.

Arranged to slide in a recess 30 in the casing 1, is a valve 31 having an opening 32 arranged to register with the bore 33 in the casing 1. The valve 31 is provided with a valve stein 32X which is kept by a spring 33x normally in position to bring the opening inthe valve in registration with the casing, vas shown-in Fig. 1.

At lV I have shown a receptacle for containing water or other suitable liquid. This .receptacle is in communication with the pressure tank 23 by means of al pipe R which is provided with a suitable pressure regulator r. The tank lV is in connection with a bore 34 in the casing 1 by means of a hose 35 or other suitable connection. A check valve 3G is provided for the purpose of retaining the liquid which is drawn into the bore From the foregoing description of the various parts of the device`r 'the operation thereof may be readily understood.

Fig. 1 shows the gun just after it has been fired. Now when it is desired to reload thc gun, the locking member 1() is released and the handle 8 is manipulated so .as to swing the barrel 4 from the I)osition shown in Fig. 1 to that shown in Fig. 2. rlhis will shift the valve 31 into the position-shown in Fig. 2, by the engagement of the finger 6* with the end of the valve stem 32X, the spring 33X being compressed. This closes the bore 33. The projectile 4 0 may now be placed in the inner end of the barrel where it is held in position by means of the spring stop member 41. The handle H of valve V is now turned into the position shown in Fig. 2, whereupon pressure from the tank 23 will pass through the pipes l), 24, and 26 into the interior of the cylinder 12 driving the piston 13 toward the rear and taking with it the shaft 14 and the weight l5. lVhen the end of the shaft lll engages the piston 1S, the latter, together with the rod 19 and the plunger 20, are also moved rearwardly, and this causes a flow of the liquid from the tank lV through the pipe 35 past the check valve 36 and into the bore 33. Then now the barrel is thrown back into position by means of the handle 8 and locked, the spring 33 causes a movement of the valve 81 so as to bring it into the position shown in Fig. 1.

7When it is desired to tire the gun, the handle H is moved into the position shown in Fig. 1, and then the pressure Jfrom the pip'e 2T will enter the opposite end of cylinder 12 and move the piston 13 forwardly. This will cause the weight 15 to move forwardly, striking the plunger 2O thus forcing the liquid forwardly and propelling the projectile in front of it.

It will be noted that pressure from the tank 23 is always behind the piston 18. The large area of the piston 13, however, will cause the movement of the piston 18 rearwardly in loading the gun or in drawing in the liquid preparatory to tiring the same.

The use of a liquid leads to two important results. One is that quicker action may be had than when air alone is used, owing to the fact of the incompressibility of the liquid. The latter, however, acts as a cooling medium and insures a cool operation.

l claim 1. In a pneumatic-hydraulic gun, a casing, a barrel hingedly connected to said casing, a plunger disposed within the casing, pneumatic means for operating said plunger, a .source of liquid supply, connections between said source of liquid supply and the plunger bore for drawing the liquid into the bore on the retraction of the plunger.

2. In a pneumatic-hydraulic gun, a casing, a barrel hingedly connected to said casing, a plunger disposed within the casing, pneumatic means for operating said plunger, a source of liquid supply, connections between said source of liquid supply and the plunger bore for drawing the liquid into the boreon the retraction of the plunger, and means for retaining the liquid within the plunger bore when the barrel is unbrceched.

3. ln a pneumatic-hydraulic gun, a casing, a barrel hingedly connected to said casing, a plunger disposed within they casing, pneumatic means for operating said plunger, a source of liquid supply, connections between said source of liquid supply and .the plunger bore for drawing the liquid into the bore on the retraction of the plunger, and means for automatically retaining the liquid within the plunger bore when the barrel is unbreeched. l

4. .in pneumatic-hydraulic gun, a casmessage ing, a barrel hingedly connected to said .casing, a plunger disposed within the casing, pneumatic means for operating said plunger, a source of liquid supply, connections between said source of liquid supply and the plunger bore for drawing the liquid into the bore on the retraction of the plunger, and means for automatically retaining the liquid within the plunger bore when the barrel is unbreeched, said means comprising a valve, and means connected with the barrel of the gun for operating the valve when the barrel is unbreeched.

5. 1n a pneumatic-hydraulic gun, a casing provided with a bore, a plunger arranged to reciprocate in said bore, a cylin/ der disposed within the casing, a piston within'the cylinder, a plunger rod, mean/s for moving the plunger rod through the movement of said piston, means for admitting uid pressure into said cylinder on either side of said piston, a weight connected with said piston and movable relatively to said plunger, and arranged to engage the plunger in its movement. y,

6. ln a pneumatic-hydraulic gun, a casing provided with a bore, a plungir arranged to reciprocate in said bore, a cylinder disposed within the casing, a piston within the cylinder, a plunger rod, means for moving the plunger rod through the movement of said piston, means for admitting fluid pressure into said cylinder on either side of said piston, a weight connected with said piston. and movable relatively to said 'plunger and arranged to engage the plunger in its movements, and an auxiliary cylinder having a piston rigidly connected to said plunger, said auxiliary cylinder being constantly under Huid pressure.

7. 1n a pneumatic-hydraulic guna casing provided with a bore, a. plunger ar ranged to reciprocate in said bore, a cylinder disposed within the casing, a piston within the cylinder, a plunger rod, means for moving the' plunger rod through the movement of said piston, means for admitting fluid pressure into said cylinder on either side of said piston, a weight connected with said piston and movable relatively to said plunger and arranged to engage the plunger in its movement, a barrel hingedly connected to said casing and provided with a bore, and a valve for cutting off communication between the plunger bore and the barrel bore.

8. In a pneumatic-hydraulic gun` a eas ing provided-with a bore, a plunger dis posed within said bore, a barrel having a bore arranged to register with the iirst named bore, and automatic means for cutting ott communication between said bores when the barrel is unbreeched.

r9. ln a pneumatie-hydraulic gun, a eas-- ing provided with a bore, a plunger disposed within said bore. a ha rel Mvuw .bore arranged to register with the rst named bore, an arm arried by said casing',

' an erin carried by said barrel, a handle carv red by said last named arm, a locking seg-y ment carried by said first-named arm, a pivetal eonnectlon between sind arms, 'and means for locking, the barrel t0 the easing. F10. In e pneumatic-hydraulic gun, a casing, a barrel hingedly connected hereo, an. wenn having an extension carried by said barrel, said easing having ev plunger bere and said barrel hevngaJ projectile bore erranged to register with said plunger bore, a slidable valve for cuttingof Communie@N tion between said plunger bore and seid projectile boren and a .spring pressed valve stem arranged to be engaged by said extension and to bemoved transversely of said boren.v

y norme CALVIN Hm,.- 

